<div style="display: flex; align-items: center;">
  <d-button bsStyle="primary" bsSize="xs" style="margin-right: 8px"> Extra small</d-button>
  <d-button bsStyle="common" bsSize="sm" style="margin-right: 8px"> Small </d-button>
  <d-button bsStyle="common" style="margin-right: 8px"> Middle </d-button>
  <d-button bsStyle="common" bsSize="lg"> Large </d-button>
</div>
